256216392 has 64 divisors (see below), whose sum is σ = 736272000. Its totient is φ = 82458432.

The previous prime is 256216357. The next prime is 256216393. The reversal of 256216392 is 293612652.

256216392 is a `hidden beast` number, since 2 + 56 + 216 + 392 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (256216393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14188 + ... + 26715.

It is an arithmetic number, because the mean of its divisors is an integer number (11504250).

Almost surely, 2^256216392 is an apocalyptic number.

It is an amenable number.

256216392 is an abundant number, since it is smaller than the sum of its proper divisors (480055608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256216392 is a wasteful number, since it uses less digits than its factorization.

256216392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40947 (or 40937 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 256216392 is about 16006.7608216029. The cubic root of 256216392 is about 635.1392771148.

The spelling of 256216392 in words is "two hundred fifty-six million, two hundred sixteen thousand, three hundred ninety-two".